xfrm: Fix dev use-after-free in xfrm async resumption
In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix dev use-after-free in xfrm async resumption xfrm async resumption hold skb->dev refcnt until after transport_finish. However, xfrm_rcv_cb may modify skb->dev to tunnel dev without taking device reference, such as vti_rcv_cb. The subsequent async resumption will decrement the tunnel device's reference count, which lead to uaf of tunnel dev and refcnt leak of orig dev as below: unregister_netdevice: waiting for vti1 to become free. Usage count = -2 Stash the original skb->dev to fix refcnt imbalance. The new skb->dev set by xfrm_rcv_cb can race with device teardown. Extend rcu protection over xfrm_rcv_cb and transport_finish to prevent races.
CVE-2026-72463
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-72463
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4236c30b437b80f673b9e08c8fae38b8d471ac9e",
"lessThan": "fed4d3195a31125566876952ce66113ec1eb9008",
"versionType": "git"
},
{
"status": "affected",
"version": "0f451b43c88bf2b9c038b414be580efee42e031b",
"lessThan": "1acd93259b6be269e26be5d71c224bccd1f8352f",
"versionType": "git"
},
{
"status": "affected",
"version": "1c428b03840094410c5fb6a5db30640486bbbfcb",
"lessThan": "63a30015199912bd5055bead8001b1ae68a67cdb",
"versionType": "git"
},
{
"status": "affected",
"version": "1c428b03840094410c5fb6a5db30640486bbbfcb",
"lessThan": "8045c0df98d4f14c54e5cb875f1c9c0ce89fe4ff",
"versionType": "git"
},
{
"status": "affected",
"version": "94439cbe478b53f92223da9aae95fffb28623c3f",
"versionType": "git"
},
{
"status": "affected",
"version": "5002beda5cac69d522dc54da0d5d463ed9c963d2",
"versionType": "git"
},
{
"status": "affected",
"version": "6.12.94",
"lessThan": "6.12.112",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.23",
"lessThan": "6.18.54",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.160",
"lessThan": "6.7",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.19.13",
"lessThan": "6.20",
"versionType": "semver"
}
],
"programFiles": [
"net/ipv4/xfrm4_input.c",
"net/ipv6/xfrm6_input.c",
"net/xfrm/xfrm_input.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv4/xfrm4_input.c",
"net/ipv6/xfrm6_input.c",
"net/xfrm/xfrm_input.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72463
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #46524 · Revision 1
- Added to Heist Feed
- Publisher date